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1. => split your chars at the lever combination to get to the east sector of this level. Then look for a room with a lit torch near a door, blow it out.

http://www.kiya1.de/beyond/act1maps/Act1lvl2map0.jpg => 8+9 for the levers - 10 for the torch.


^ For question 2, never did battlefields Act I myself so no clue there.